Flower color in sweet pea in part comes from the pigment anthocyanin. One step is catalyzed by an enzyme called chalcone synthase. When chalcone synthase doesn't work at all , the flowers are white. The normal enzyme is denoted + whereas the non-functioning enzyme is denoted -. Heterozygotes are purple. In a particular large population the following genotype frequencies are observed:
genotype frequencies
Genotype Frequency
++ 0.60
+- 0.20
-- 0.20
What is the frequency of the - allele in this population?

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip.nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule.true/false

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen